Hans Duffels’s research while affiliated with Naturalis Biodiversity Center and other places

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Publications (3)


Figure 1 of 1
New data on the Heteroptera fauna of La Palma, Canary Islands (Insecta: Hemiptera)
  • Article
  • Full-text available

January 2013

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376 Reads

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20 Citations

Acta Musei Moraviae, Scientiae biologicae

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Hans Duffels

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Hannes Günther

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[...]

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Gerhard Strauss

New data on the Heteroptera fauna of La Palma, Canary Islands (Insecta: Hemiptera). In: KMENT P., MALENOVSKÝ I. & KOLIBÁÈ J. (eds.): Studies in Hemiptera in honour of Pavel Lauterer and Jaroslav L. Stehlík. Acta Musei Moraviae, Scientiae biologicae (Brno) 98(2): 459–493. – Heteroptera collected on La Palma in the Canary Islands during the period 2001–2012 are listed. Data for 153 species are given, including 28 species recorded for the first time from La Palma. Six of these species are also new for the Canary Islands: Cantacader quadricornis (Lepeletier et Serville, 1828) (Tingidae), Bryocoris pteridis (Fallén, 1807), Macrolophus pygmaeus (Rambur, 1839), Thiomiris sulphureus (Reuter, 1879) (all Miridae), Amphiareus obscuriceps (Poppius, 1909) (Anthocoridae) and Ischnodemus quadratus Fieber, 1837 (Lygaeidae). Furthermore, the occurrence of eight species on La Palma is confirmed. With this contribution the number of species known from the Canary Islands and La Palma increases to 400 and 216 respectively. The number of Canarian endemic species on La Palma is 48 (22.2 %). Lindbergopsallus lauri Rieger, 2012 and L. lunariae Rieger, Strauß et Günther, 2011 (Miridae), Collartida tanausu J. Ribes, Oromi et E. Ribes, 1998 (Reduviidae) and Nysius gloriae Baena et Garcia, 1999 (Lygaeidae) are only known from La Palma.

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Taxonomy and song of the cicada Ayesha serva (Walker, 1850) from the coasts of northern Sundaland

December 2012

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208 Reads

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1 Citation

Tijdschrift voor Entomologie

The genus Ayesha belongs to the tribe Dundubiini and is distinguished from other genera of the tribe by the spatulate and strongly overlapping male opercula. The synonymy of three species, Cosmopsaltria vomerigera Breddin, 1901, Dundubia lelita Kirkaldy, 1902 and Cicada elopurina Distant, 1888, which are treated as junior synonyms of A. serva (Walker, 1850) in the literature, is confirmed. Two other species, A. spathulata Stål, 1870 and A. operculissima Stål, 1870, are synonymized here with A. serva, so that Ayesha now becomes a monotypic genus. Ayesha serva is redescribed and recorded from Greater Natuna Island, the northern parts of Borneo and Sulawesi and the southern Philippines; the species is mainly found in trees on the beach, in mangroves and other coastal forests. The broad band long lasting monotonous calling song has a very simple and constant pattern. It consists of a fast repetition of many echemes of duration from 41.7 to 79.0 ms, which are composed of 8 to 19 pulses with a repetition rate of 240 pulses per second.


Frequency modulated song of the cicada Maua albigutta (Walker, 1856) (Auchenorrhyncha: Cicadoidea) from South East Asia

January 2004

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257 Reads

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8 Citations

The song and the calling behaviour of the cicada Maua albigutta (WALKER, 1856) from S.E. Asia is described. The majority of the investigations has been carried out in the Endau Rompin National Park, Malaysia. The calling song comprises three main parts (A - C) with characteristic amplitude and especially in the third part with intense frequency modulation. The duration of the whole song is 38.2  5.1 s and is often repeated without interruption many times in succession. Amplitude and frequency modulation is accompanied with movements of the abdomen and during frequency modulated calls also with changes of its shape. Songs from other localities (Kuala Lompat – Malaysia, Krui – Sumatra) are slightly different but clearly follow the same general pattern, and can be attributed with certainty to the same species

Citations (2)


... Apart from A. alboscutellata, two endemic species of the genus Auchenocrepis Fieber, 1858 have been reported from the Canary Islands, so far: Auchenocrepis nigricornis Wagner, 1954 from the island of Gran Canaria and Auchenocrepis similis Wagner, 1954 from the island of Fuerteventura (AUKEMA et al., 2006(AUKEMA et al., , 2013RIEGER, 2020;ROCA-CUSACHS et al., 2020). According to Paride Dioli (pers. ...

Reference:

New records of Heteroptera from the Canary Islands (Spain), XXI
New data on the Heteroptera fauna of La Palma, Canary Islands (Insecta: Hemiptera)

Acta Musei Moraviae, Scientiae biologicae

... However, the ''tuned resonator'' alone cannot account for the very high levels of acoustic energy radiated by the relatively small animal (MacNally and Young 1980), which are mainly attributed to non-linear characteristics of the signal (Hughes et al. 2009). Singing animals can adjust the resonant properties by stretching and raising the abdomen, thus enlarging the resonant cavity inside as well as the room between thorax and abdomen (Gogala et al. 2004; Boulard 2006 ). Adjustment of the thorax–abdomen gap may increase the sound volume by tuning the cavity to the eigenfrequency of the tymbal plate, while dilatation of the abdomen might raise the sharpness of tuning and reduce the damping (Pringle 1954; Bennet-Clark and Young 1998). ...

Frequency modulated song of the cicada Maua albigutta (Walker, 1856) (Auchenorrhyncha: Cicadoidea) from South East Asia